Just like grasses on land, seagrasses form vast meadows, produce flowers and seeds, and are home to an incredibly diverse community of organisms. Seagrasses are found around the world, in tropical and colder regions. Shades of green indicate numbers of species reported for an area. (from 2005 UNEP-WCMC).
Mood disorders, or affective disorders, are mental health problems such as depression, bipolar disorder, and mania.Mood disorders can occur in anyone, including children. The cause of mood disorders is not fully understood, but an imbalance in brain chemicals known as neurotransmitters is likely to play a role.ood disorders can also cause an elevated mood (mania) that is accompanied by feelings of grandiosity, extreme energy, and heightened arousal. These feelings are stronger and last longer than normal, and interfere with day-to-day life.
Mood Disorders. Mood disorders include major depressive disorder, dysthymic disorder, and bipolar disorder. 1  Approximately 20.9 million American adults, or about 9.5 percent of the U.S. population age 18 and older in a given year, have a mood disorder. 2  The median age of onset for mood disorders is 30 years.ood Disorders. Mood disorders include major depressive disorder, dysthymic disorder, and bipolar disorder. 1  Approximately 20.9 million American adults, or about 9.5 percent of the U.S. population age 18 and older in a given year, have a mood disorder. 2  The median age of onset for mood disorders is 30 years.